Wire rope



E. H. PARKER Jan. 22 '1924.

W IRE ROPE Filed Aug* l2. 1921 2 Sheets-Sheet l Jan. 22 1924.

E` H. PARKER WIRE ROPE Filed Aug. 12. 1921 2 Sheets-Sheet 2 Patented dan. 22, lgd.

raras EDWARD HAROLD PARKER, or''RELEEVILLE,` nEw JERSEY, Assrc'fNoR or ONE-HALE To CLARENCE E. iunfrnnws, er CLEVELAND, oEIo.

WIRE ROPE.

application led August 12,1921.

To all whom it may concern:

Be it known that l, EDWARD HARoLD Fen KER, a citizen of the United States, and a resident of Belleville, in the county of Essex and State of New Jersey, have invented certain new and useful improvements in *Wire Ropes, ot which the following is a specification.

This invention relates to wire ropes and is particularly although not exclusively designed to be used in connection with elevators of the type known as traction elevators. ln elevators ot this type, the cable passes over a motor driven sheave provided with Ushape or V-shape grooves; and the rope is propelled by friction between the walls ot' the grooves and the rope. It will be understood that the greater the wearing surface, that is actual rotundity, of the rope the better; and this is especially true when using the cable in connection with a sheave having V-shape grooves. ln order to obtain the requisite rotundity, it is customary to make the rope as large as possible and to obtain the requisite cushioning, to provide it with a core of hemp or other material of relatively large size. ln practice, it has been found that, under the severe conditions or" strain and stress to which cables of this character are subjected, the core will rrequently collapse thereby destroying the rotundity, and by that the usefulness, of the rope beca-use of the material decrease in wearing surface occasioned thereby. The

main object and feature ot this invention `is to obviate these ditculties.

ln the accompanying drawings the invention is disclosed in a concrete and preferred form in whichso Fig. l is a View in elevation of a length of rope embodying the invention.

Fig. 2 is a transverse sectional view on the line 2-2 of Fig. l.

Fig. 3 is a fragment-ary sectional view showing one method of forming the intermediate core.

Fig. 4f is a fragmentary sectional view showing another method of forming the intermediate core.

1 indicates a core ot any suitable material such as hemp, or the like', around which are laid six inner strands 2, each strand serial No. 491,719.

being composed ot a plurality of wires 3 (here seven in number) twisted together. 4 indicates a plurality ot outer strands, in 5 number twice that or the inner strands, each outer strand being composed of a number of wires twisted together. The diameter of the outer and inner strands and the number and diameter of the wires of both the inner and outer strands are alike. `The outer strands can therefore be laid around the inner strands in the manner indicated in Fig. 2 where it will be observedthat one alternate setot outer strands, indicated by e?, will come directly over the inner strands and will be radial to and in contact with the inner strands. The thrust on the set 4a of outer strands will therefore be transmitted directly to core 1. interposed between the other alternate set of outer strands, indicated by 4", and the inner strands is an auxiliary core 6 which receives the thrust ot said other alternate set of outer strands 4b. l 'have found that by 75 the foregoing means a large rope having requisite wearing surface is produced; that the rope is flexible and pliable; and that the v center core does not tend to collapse or `flatten. The auxiliary core may be produced in different ways. ln some instances a simple strand ot brous material indicated by dot ted circle 7 in Fig. 3 is laid between the inner strands and a member or' set ab of the outer strands while, in other instances, l prefer to use two strands of fibrous material,

Aindicated by dotted circles 8 in Fig. 4c. That is to say: either six or twelve strands of iibrous material. In either event, the fibrous material is, during the laying of the rope, squeezed into the interstices between ythe inner and outer metallic strands.

l claim: y

A-wire rope comprising: a ibrous core, a plurality of inner strands laid around said core, each strand being composedot a plurality of wires twisted together, a plurality of outer strands, in number twice that of the inner strands, and each outer strand bein composed of a plurality of wires twisted together, the diameter ot the inner and outer strands and the number and diameter of the wires of both the inner and outer strands being the same and said outer strands being laid around the inner strands with one Set the thrust of the other alternate set of outer of alternate outer strands radial to and in strands. Contact with the inner strands7 to thereby Signed at New York city, in the borough 10 transmit the thrust of Said set of alternate of Manhattan, county and State of New 5 outer strands to the core7 anda eircumferen- York, this 11th day of August, 1921.

tially discontinuous intermediate core loen tween the inner and outer strands to receive EDWARD HAROLD PARKER. 

